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Rails find_or_create_by more than one attribute?
There is a handy dynamic attribute in active-record called find_or_create_by:
5 Answers
...
Process escape sequences in a string in Python
...ode the string.
>>> myString = "spam\\neggs"
>>> decoded_string = bytes(myString, "utf-8").decode("unicode_escape") # python3
>>> decoded_string = myString.decode('string_escape') # python2
>>> print(decoded_string)
spam
eggs
Don't use the AST or eval. Using t...
What is the difference between C, C99, ANSI C and GNU C?
...ain (ISO 9899:2011). This version is called C11. Various new features like _Generic, _Static_assert and thread support were added to the language. The update had a lot of focus on multi-core, multi-processing and expression sequencing. From 2011-2017, this was "the C language".
In 2017, C11 was rev...
How to unpack and pack pkg file?
...nstalled this pkg nothing happend. In console I got this message: posix_spawn("/Library/Application Support/Project1/Project1.app/Contents/MacOS/Project1", ...): No such file or directory. I have investigated that old Payload file has /./Project1.app/... and new payload has /Project1.app/... in...
What are the downsides to using Dependency Injection? [closed]
...n ivory tower builder.
Relevant Links
http://thedailywtf.com/Articles/The_Inner-Platform_Effect.aspx
http://www.joelonsoftware.com/articles/fog0000000018.html
Probably the simplest form of dependency injection (don't laugh) is a parameter. The dependent code is dependent on data, and that data...
Best way to create an empty object in JSON with PHP?
...ll end up with a {} in your encoded data you could use a hack such as:
json_encode (json_decode ("{}"));
Even though it's tedious and ugly I do assume/hope that json_encode/json_decode is compatible with one and other and always will evalute the following to true:
$a = <something>;
$a === js...
MySQL Error 1215: Cannot add foreign key constraint
...
I'm guessing that Clients.Case_Number and/or Staff.Emp_ID are not exactly the same data type as Clients_has_Staff.Clients_Case_Number and Clients_has_Staff.Staff_Emp_ID.
Perhaps the columns in the parent tables are INT UNSIGNED?
They need to be exactly ...
How to remove a directory from git repository?
...e directory and recommit it to the .git repo?
– alpha_989
Jan 21 '18 at 18:15
1
Great! Working!
...
Rendering JSON in controller
...ting your own dogfood and doing both
In both cases render :json => some_data will JSON-ify the provided data. The :callback key in the second example needs a bit more explaining (see below), but it is another variation on the same idea (returning data in a way that JavaScript can easily handle....
Callback on CSS transition
...EventNames[name] }
}
}
return false // explicit for ie8 ( ._.)
}
// http://blog.alexmaccaw.com/css-transitions
$.fn.emulateTransitionEnd = function (duration) {
var called = false, $el = this
$(this).one($.support.transition.end, function () { called = true })
var ...